uhd: added new convert directory with type conversion registry (needs testing)

1 files changed, 117 insertions, 0 deletions

diff --git a/host/lib/convert/convert.cpp b/host/lib/convert/convert.cpp
new file mode 100644
index 000000000..f635a1040
--- /dev/null
+++ b/host/lib/convert/convert.cpp
@@ -0,0 +1,117 @@
+//
+// Copyright 2011 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/convert.hpp>
+#include <uhd/utils/static.hpp>
+#include <uhd/utils/exception.hpp>
+#include <iostream>
+
+using namespace uhd;
+
+#include "convert_impl.hpp"
+
+static const bool debug = false;
+
+/***********************************************************************
+ * Define types for the function tables
+ **********************************************************************/
+struct fcn_table_entry_type{
+    convert::priority_type prio;
+    convert::function_type fcn;
+    fcn_table_entry_type(void)
+    : prio(convert::PRIORITY_EMPTY), fcn(NULL){
+        /* NOP */
+    }
+};
+typedef std::vector<fcn_table_entry_type> fcn_table_type;
+
+/***********************************************************************
+ * Setup the table registry
+ **********************************************************************/
+UHD_SINGLETON_FCN(fcn_table_type, get_cpu_to_otw_table);
+UHD_SINGLETON_FCN(fcn_table_type, get_otw_to_cpu_table);
+
+fcn_table_type &get_table(dir_type dir){
+    switch(dir){
+    case DIR_OTW_TO_CPU: return get_otw_to_cpu_table();
+    case DIR_CPU_TO_OTW: return get_cpu_to_otw_table();
+    }
+    UHD_THROW_INVALID_CODE_PATH();
+}
+
+/***********************************************************************
+ * The registry functions
+ **********************************************************************/
+void uhd::convert::register_converter(
+    const std::string &markup,
+    function_type fcn,
+    priority_type prio
+){
+    //extract the predicate and direction from the markup
+    dir_type dir;
+    pred_type pred = make_pred(markup, dir);
+
+    //get a reference to the function table
+    fcn_table_type &table = get_table(dir);
+
+    //resize the table so that its at least pred+1
+    if (table.size() <= pred) table.resize(pred+1);
+
+    //register the function if higher priority
+    if (table[pred].prio < prio){
+        table[pred].fcn = fcn;
+        table[pred].prio = prio;
+    }
+
+    //----------------------------------------------------------------//
+    if (debug) std::cout << "register_converter: " << markup << std::endl
+        << "    prio: " << prio << std::endl
+        << "    pred: " << pred << std::endl
+        << "    dir: " << dir << std::endl
+        << std::endl
+    ;
+    //----------------------------------------------------------------//
+}
+
+/***********************************************************************
+ * The converter functions
+ **********************************************************************/
+void uhd::convert::io_type_to_otw_type(
+    const io_type_t &io_type,
+    const otw_type_t &otw_type,
+    input_type &input_buffs,
+    output_type &output_buffs,
+    size_t nsamps_per_io_buff
+){
+    pred_type pred = make_pred(io_type, otw_type, input_buffs.size(), output_buffs.size());
+    fcn_table_type table = get_cpu_to_otw_table();
+    function_type fcn = table.at(pred).fcn;
+    fcn(input_buffs, output_buffs, nsamps_per_io_buff);
+}
+
+void uhd::convert::otw_type_to_io_type(
+    const io_type_t &io_type,
+    const otw_type_t &otw_type,
+    input_type &input_buffs,
+    output_type &output_buffs,
+    size_t nsamps_per_io_buff
+){
+    pred_type pred = make_pred(io_type, otw_type, input_buffs.size(), output_buffs.size());
+    fcn_table_type table = get_otw_to_cpu_table();
+    function_type fcn = table.at(pred).fcn;
+    fcn(input_buffs, output_buffs, nsamps_per_io_buff);
+}